Transmission Shift Indicator - Description and Operation
Shift Indicator: Testing and Inspection
The diagnosis found here addresses an inoperative upshift indicator lamp condition. If lamp accuracy is suspect, diagnosis should be performed with a
DRB scan tool.
WARNING: ON VEHICLES EQUIPPED WITH AIRBAGS, REFER TO AIRBAGS BEFORE ATTEMPTING ANY STEERING WHEEL,
STEERING COLUMN, OR INSTRUMENT PANEL COMPONENT DIAGNOSIS OR SERVICE. FAILURE TO TAKE THE PROPER
PRECAUTIONS COULD RESULT IN ACCIDENTAL AIRBAG DEPLOYMENT AND POSSIBLE PERSONAL INJURY.
If the upshift indicator lamp fails to light when a transmission upshift is required (as noted by high engine speed with low engine load), replace the
upshift indicator lamp bulb with a known good unit. If the indicator lamp still fails to operate, diagnosis of the Powertrain Control Module (PCM) and
the Chrysler Collision Detection (CCD) data bus should be performed with a DRB scan tool. For further diagnosis of the upshift indicator lamp and the
instrument cluster circuitry, see instrument Cluster.
